Global Geology 2012, 15(1) 74-77 DOI:     ISSN: 1673-9736 CN: 22-1371/P

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Keywords
BET adsorption isotherm
coal bed methane
geophysical well logging
gas content
evaluation method
Authors
ZHANG Yi
FAN Xiaomin
HAN Xue
NAN Zeyu and XU Jun
PubMed
Article by ZHANG Yi
Article by FAN Xiaomin
Article by HAN Xue
Article by NAN Zeyu and XU Jun

Evaluation of coal bed methane content using BET adsorption isotherm equation

ZHANG Yi, FAN Xiaomin, HAN Xue, NAN Zeyu and XU Jun

College of Geo-Exploration Science and Technology,Jilin University,Changchun 130026,China

Abstract

Coal bed methane is unconventional raw natural gas stored in coal seam with considerable reserves in China. In recent years,as the coal bed methane production,the safety and the use of resources have been paid more attentions. Evaluating coal bed methane content is an urgent problem. A BET adsorption isotherm equation is used to process the experimental data. The various parameters of BET equation under different temperatures are obtained; a theoretical gas content correction factor is proposed,and an evaluation method of actual coal bed methane is established.

Keywords BET adsorption isotherm   coal bed methane   geophysical well logging   gas content   evaluation method  
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